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New energy superconducting material and preparation method thereof

A technology for superconducting materials and new energy, applied in the field of superconducting materials for new energy and their preparation, can solve the problems of improving and detrimental to the overall performance of superconducting materials, affecting other properties of superconducting materials, and achieving the effect of improving sintering efficiency

Inactive Publication Date: 2018-05-29
叶芳
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the increase of the critical temperature often affects other properties of the superconducting material, which is not conducive to the improvement of the overall performance of the superconducting material.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] S1: Mix Mg powder, lanthanum oxide, and Se powder in a mass ratio of 1:3:2, put them into a ball mill jar, and use stainless steel balls with a diameter of 3mm to ball mill for 2 hours in an argon atmosphere of 0.08MPa;

[0021] S2: Put the ball-milled powder in step S1 into an S-shaped flat mold, the thickness of the S-shaped flat mold is 5 mm, and the length is 0.5 cm; then apply a pressure of 8 MPa to the mold, and keep the pressure for 10 minutes;

[0022] S3: Put the sample obtained in step S2 into a vacuum sintering furnace for sintering; the vacuum degree is kept at 3.5Pa; the temperature rise program is: heat up to 350°C at 5°C / min for 1 hour; heat up to 650°C at a rate of 15°C / min and hold React for 50 minutes; heat up at a rate of 15°C / min to 850°C for 1.5 hours; cool down to room temperature at a rate of 20°C / min, and grind to obtain the superconducting composite material.

Embodiment 2

[0024] S1: Mix Mg powder, lanthanum oxide, and Se powder in a mass ratio of 1:5:4, put them into a ball mill jar, and make stainless steel balls with a diameter of 5mm, and ball mill them in an argon atmosphere of 0.16MPa for 1 hour;

[0025] S2: Put the ball-milled powder in step S1 into an S-shaped flat mold, the thickness of the S-shaped flat mold is 8 mm, and the length is 1 cm; then apply a pressure of 2 MPa to the mold, and keep the pressure for 15 minutes;

[0026] S3: Put the sample obtained in step S2 into a vacuum sintering furnace for sintering; the vacuum degree is kept at 1.5Pa; the heating program is: heating at 10°C / min to 450°C for 2 hours; heating at a rate of 10°C / min to 750°C for holding React for 80 minutes; heat up at a rate of 20°C / min to 950°C for 2.5 hours; cool down to room temperature at a rate of 30°C / min, and grind to obtain the superconducting composite material.

Embodiment 3

[0028] S1: Mix Mg powder, lanthanum oxide, and Se powder in a mass ratio of 1:3:4, add them to a ball mill jar, and use stainless steel balls with a diameter of 5mm, and ball mill them in an argon atmosphere of 0.12MPa for 1.5h;

[0029] S2: put the ball-milled powder in step S1 into an S-shaped flat mold, the thickness of the S-shaped flat mold is 7 mm, and the length is 0.8 cm; then apply a pressure of 5 MPa to the mold, and keep the pressure for 12 minutes;

[0030] S3: Put the sample obtained in step S2 into a vacuum sintering furnace for sintering; the vacuum degree is kept at 2.5Pa; the heating program is: heating at 7°C / min to 380°C for 1.5 hours; heating at a rate of 12°C / min to 680°C Insulate and react for 65 minutes; heat at a rate of 18°C / min to 900°C for 2 hours; cool down to room temperature at a rate of 22°C / min, and grind to obtain the superconducting composite material.

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Abstract

The invention discloses a method for preparing a new energy superconducting material. The method comprises mixing Mg powder, cerium oxide and Se powder, adding the mixture into a ball mill tank, carrying out ball milling in an argon atmosphere for 1-2 hours, putting the powder into a S-shaped plane mold, applying pressure of 2-8 MPa to the mold, keeping the pressure for 10-15min, putting a sampleinto a vacuum sintering furnace, carrying out sintering, keeping a vacuum degree to 3.5 MPa or less, heating the sample to 350-450 DEG C at a heating rate of 5-10 DEG C / min for a thermal insulation reaction for 1-2h, heating the product to 650-750 DEG C at a heating rate of 10-15 DEG C / min for a thermal insulation reaction for 50-80min, heating the product to 850-950 DEG C at a heating rate of 15-20 DEG C / min for a thermal insulation reaction for 1.5-2.5h, cooling the product to the room temperature at a rate of 20-30 DEG C / min and carrying out grinding to obtain the new energy superconductingmaterial.

Description

technical field [0001] The invention belongs to the field of new energy materials, and in particular relates to a superconducting material for new energy and a preparation method thereof. Background technique [0002] When the temperature of some materials drops to a certain critical temperature, its resistance completely disappears. This phenomenon is called superconductivity, and materials with this phenomenon are called superconducting materials. Another characteristic of superconductors is: when the resistance disappears, the magnetic induction line will not pass through the superconductor, this phenomenon is called diamagnetism. The resistivity of general metals (such as: copper) gradually decreases with the drop of temperature, and when the temperature is close to 0K, its resistance reaches a certain value. In 1919, Dutch scientist Onnes cooled mercury with liquid helium, and when the temperature dropped to 4.2K (ie -269°C), he found that the resistance of mercury dis...

Claims

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Application Information

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IPC IPC(8): C04B35/50C04B35/65C04B35/547
CPCC04B35/50C04B35/547C04B35/65C04B2235/401C04B2235/6562C04B2235/6565C04B2235/6567C04B2235/6581C04B2235/96
Inventor 叶芳
Owner 叶芳
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